Summary
Liverpool can nine points clear at top after Spurs lose to Wolves
Man City can diminish gap when they face Southampton on Sunday
Maitland-Niles gives Arsenal lead, putting away low Iwobi cross
Firmino scores twice in two minutes - puts away loose ball and then stunning individual goal
Mane finishes pass from Salah, who wins and scores penalty for fourth, Firmino adds penalty for his hat-trick